A developer encountered two undocumented bugs while building an open-source task panel for Claude using MCP Apps. The first bug involved the `resourceUri` field, which has two seemingly valid locations but only one functions correctly, leading to issues with UI rendering. The second bug was related to CSS specificity, where custom class selectors overridden the default `[hidden]` attribute's display property, causing three UI issues simultaneously: an empty state appearing incorrectly, and menu elements failing to close properly. AI
IMPACT Highlights potential developer friction points and undocumented behaviors in AI platform SDKs, impacting tool development.
RANK_REASON The item details specific technical bugs encountered while building a tool for an existing platform, rather than a new release or significant industry event.
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